Suppose i have a job scheduled to run every 15 min for e.g. to read sales order from a flat file (also available every 15 min) and upload it. Initially it starts at 10:00 am. Next it runs at 10:15 am and so on. Suppose The first run takes time more than 15 minutes (say 20 min) to upload sales order due to large number of records. So will the next job run at 10:15 am and pick up the next file or will it not run at all??
To solve this you can create an additional file when the job starts and remove this file again when the transfer finished. The program has to check then, before running, whether this second file exists and end itself if it does.
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